Spring SpringBoot JavaConfig方式配置拦截器

一、先定义自己的拦截器

实现HandlerInterceptor 接口，重写preHandle()，postHandle(),afterCompletion()方法。

package com.hnms.demo.interceptor; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Author : WangRui * Date : 2018/5/17/017 * Describe : */ public class MyInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { response.setHeader("Access-Control-Allow-Origin","*"); System.out.println("在请求处理之前进行调用（Controller方法调用之前）"); return true;// 只有返回true才会继续向下执行，返回false取消当前请求 } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { response.setHeader("Access-Control-Allow-Origin","*"); System.out.println(">>>请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）"); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { System.out.println(">>>在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）"); } }

二、定义配置类

创建一个配置类MyWebAppConfigurer继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法。

package com.hnms.demo.interceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; /** * Author : WangRui * Date : 2018/5/17/017 * Describe : */ @Configuration public class MyWebAppConfigurer extends WebMvcConfigurerAdapter { @Override public void addInterceptors(InterceptorRegistry registry) { // addPathPatterns 用于添加拦截规则 // excludePathPatterns 配置某些路径不拦截 InterceptorRegistration addInterceptor = registry.addInterceptor(new MyInterceptor()); addInterceptor.excludePathPatterns("/test"); addInterceptor.addPathPatterns("/**"); //如果有多个拦截器 //InterceptorRegistration addInterceptor2 = registry.addInterceptor(new MyInterceptor2()); super.addInterceptors(registry); } }

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